• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Sinorock 2009 >STUDY ON SUPPORT DESIGN FOR SUBSEA TUNNEL
【24h】

STUDY ON SUPPORT DESIGN FOR SUBSEA TUNNEL

机译：浅埋隧道支护设计研究

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Abstract Supports characteristics and supports design of Jiaozhow Bay subsea tunnel, which is the second self-building tunnel in China, are studied in this paper. The rock cover of Jiaozhow Bay subsea tunnel is relatively thin, so tunneling in unfavorable geologic bodies requires some special considerations, since misjudgment in support design results in costly failures. Numerical method is taken to study the influence of stress filed on seepage field and the effect of the changes of surrounding rock permeability coefficient, water level, permeability coefficient and thickness of grouting ring to seepage field are analyzed. According to the research, the pore water pressure and water inflow induced by tunnel excavation can be hardly affected by arching effect. If keeping the water level above horizontal plane fixed, the distribution of pore water pressure will not change with permeability coefficient of surrounding rock. The water inflow increases with the increase of permeability coefficient of surrounding rock or water level height above surrounding rock. The decrease of permeability coefficient and the increase of thickness of grouting ring can both reduce ground water inflow, but there exists an optimal value in grouting parameters. In practice the decision should be made carefully between economy and water plugging effect to confirm the optimal grouting parameters. Probabilistic numerical approach is adopted for the design of subsea tunnel supports, using hyperstatic reaction method. From the calculation result it is possible to obtain the probabilistic distribution of the support safety factors and then design the support for Jiaozhow Bay subsea tunnel on the basis of the given probabilistic curve. Whole process optimization for Jiaozhow Bay subsea tunnel is put forward, which includes optimized support parameters acquisition, design variable sensitivity analysis and evaluation of the optimal design. According to the characteristics of subsea tunnel in Jiaozhow Bay, optimization method mentioned above is used to make optimization analysis. This study can provide instructional references for both design and construction of the Jiaozhow Bay subsea and it can be also useful for similar projects.
机译：摘要本文研究了中国第二条自建隧道-胶州湾海底隧道的支护特性和支护设计。焦作湾海底隧道的岩层相对较薄，因此在不利的地质体中进行隧道施工需要一些特殊的考虑，因为支护设计的错误判断会导致重大的破坏。采用数值方法研究了应力场对渗流场的影响，分析了围岩渗透系数，水位，渗透系数和灌浆环厚度的变化对渗流场的影响。根据研究，拱形效应几乎不会影响隧道开挖引起的孔隙水压力和入水量。如果保持水平面以上的水位固定，则孔隙水压力的分布不会随围岩的渗透系数而变化。入水量随围岩渗透系数或围岩上方水位高度的增加而增加。渗透系数的减小和灌浆环厚度的增加都可以减少地下水的流入量，但灌浆参数存在最优值。在实践中，应在经济性和堵水效果之间仔细做出决定，以确认最佳灌浆参数。采用超静力反应法，采用概率数值方法设计海底隧道支架。从计算结果可以得出支护安全系数的概率分布，然后根据给定的概率曲线设计焦作湾海底隧道的支护。提出了焦作湾海底隧道的全过程优化，包括优化支护参数的获取，设计变量的敏感性分析以及最优设计的评价。根据焦作湾海底隧道的特点，采用上述优化方法进行优化分析。这项研究可以为焦作湾海底的设计和建设提供指导性参考，对于类似的项目也可能是有用的。

著录项

  • 来源
    《Sinorock 2009》|2009年|p.1-6|共6页
  • 会议地点 Hong Kong(CN);Hong Kong(CN);Hong Kong(CN)
  • 作者

    FANG Qian; ZHANG Dingli; LIU Yan; LI Pengfei;

  • 作者单位

    Tunnel and Underground Engineering Research Center of Education Ministry,Beijing Jiaotong University,Beijing 100044,China;

    Tunnel and Underground Engineering Research Center of Education Ministry,Beijing Jiaotong University,Beijing 100044,China;

    Tunnel and Underground Engineering Research Center of Education Ministry,Beijing Jiaotong University,Beijing 100044,China;

    Tunnel and Underground Engineering Research Center of Education Ministry,Beijing Jiaotong University,Beijing 100044,China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 岩石（岩体）力学及岩石测试;
  • 关键词

    subsea tunnel; physical modeling; water pressure; probabilistic design; optimization design;

    机译：海底隧道;物理建模;水压;概率设计;优化设计;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号